Thanks for your guidance.

My new router has arrived and plugged in fine. The signal I am getting is no stronger than before but I have yet to move the antenna to be outdoors. I have simply connected the two leads from the antenna and switched it on. I recall that when I plugged in the antenna into my old router a few years ago it required me connecting the router to my computer to adjust the router settings internally. I cannot find any advice on TP documentation with regard to what adjustments might be required and the chat line simply insisted that they do not recommend using externs antenna. I'd be very grateful if someone could clarify the right course of action.